If you've ever wanted a tool that can help you build custom responsive websites and prototypes, Macaw might be just the thing. And if you want to learn how to use Macaw most effectively, this book will help get you up to speed faster than anything else. Clocking in at under 300 pages, you'll learn about what Macaw is, how it works generally, and then specifically work through a small responsive website. Check out Getting Started with Macaw at macawbook.com, available for purchase in paperback or ebook from Peachpit, Amazon, or your favorite bookseller.

Chrome and Firefox are probably the gold standard for friendly web developer tools, but I still use Safari all the time. It's the best option for debugging sites on iOS using the remote debugging features. You open your site in Safari running in the iOS simulator, and in the Develop menu, like this: